Disperse in only one dimension - Trapcode Form

I'm playing around with Trapcode Form, and as fun and powerful it is, there is one very obvious feature that seems to be missing. There is an overall slider for Disperse, but what if I only want to disperse in one dimension, over X, Y, or Z but not all three?

I'm really hoping that I'm just not finding it. Or even if there is a work-around to achieve the same effect I'd be okay with that.

To be clear, I'm not talking about increasing dispersion mappped OVER X, Y, or Z Values (I know how to do that using Quick Maps). I'm specifically talking about dispersing particles in one dimensional direction.